Final answer:
The events between Pizarro and Atahualpa resulted in the downfall of the Inca Empire.
Step-by-step explanation:
The events between Pizarro and Atahualpa began on November 16, 1532, when Atahualpa and his unarmed escort arrived and the Spanish fired upon them, killing 2,000 Inca. Pizarro then rounded up and killed the Inca nobles, while his men swung swords and decapitated bodies. Atahualpa was taken prisoner and although the Incas offered gold for his ransom, Pizarro had him executed. This ultimately led to the downfall of the Inca Empire.